Abstract:
:The importance of (220)Rn (thoron) progeny for human exposure has been widely recognised in the past decades. Since no stable equilibrium factor was found between indoor thoron and its progeny, and the concentration of thoron progeny varies with time, it is necessary to develop detectors for long-term measurement that directly sample and detect thoron progeny. However, power supply of this kind of detectors has always been a problem. In this study, a set of device that is suitable for long-term measurement is introduced. A high-voltage electric field was formed for the collection of charged aerosols attached by (222)Rn (radon) and thoron progenies on solid-state nuclear track detector. Impact from radon progeny could be eliminated with a shield of Al foil of appropriate thickness. Tests were made both in an experimental house and in a thoron chamber in Helmholtz Zentrum München to determine the parameters and to verify the universality under different conditions.
journal_name
Radiat Prot Dosimetryjournal_title
Radiation protection dosimetryauthors
Bi L,Tschiersch J,Meisenberg O,Wielunski M,Li JL,Shang Bdoi
10.1093/rpd/ncr078subject
Has Abstractpub_date
2011-05-01 00:00:00pages
288-94issue
2-3eissn
0144-8420issn
1742-3406pii
ncr078journal_volume
145pub_type
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